Magnetic writer having a split yoke

ABSTRACT

A method and system for providing a magnetic transducer are described. The magnetic transducer includes a first pole, a write gap, a second pole, a first coil, and a second coil. The first pole has a front portion on which at least a portion of the write gap resides. The second pole includes a split yoke that includes a first portion and a second portion. At least a portion of the first coil resides between the first portion of the split yoke and the first pole. At least a portion of the second coil resides between the second portion of the split yoke and the first pole.

BACKGROUND

In order to write data to and read data from a media, a recording headis typically used. FIGS. 1 and 2 depict side and perspective views ofportion of a conventional perpendicular magnetic recording (PMR) head10. For simplicity, only the write transducer 20 is shown in FIGS. 1 and2. In addition, for clarity, FIGS. 1 and 2 are not drawn to scale.Although only the write transducer 20 is shown, the conventional writetransducer 20 is generally part of a merged head that includes thetransducer for writing, a read transducer for reading data from themedia, and a slider. In addition, for clarity, only the conventionalsecond pole (P2) 30 and the PMR write pole 32 are depicted in FIG. 2.

The conventional PMR head 10 includes a conventional first pole (P1) 22,insulator 24, a first coil 26, P1 pad 28, the conventional P2 30, theconventional PMR write pole (or main pole) 32, insulator 24, write gap36, a shield pad 34, a second coil 38, and shield 40. The conventionalP2 30 has a length perpendicular to the ABS that is on the order ofthirteen to sixteen micrometers. Although not explicitly shown, seedlayer(s) may be used in providing the conventional poles 22, 30, and 32.The conventional PMR write transducer 20 is also depicted with two coils26 and 38. However, PMR heads having a single coil are also typicallyused.

In order to write data to a PMR media, the coils 26 and 38 areenergized. Consequently, the conventional P2 and 30 conventional PMRpole 32 are magnetized and the media written by flux from the pole tipof the conventional PMR pole 32. Based on the direction of currentthrough the coils 26 and 38, the direction of magnetic flux through theconventional PMR pole 32 changes. Thus, bits having opposingmagnetization can be written and the desired data stored on the PMRmedia.

Although the conventional PMR head 10 functions, there are drawbacks.The conventional PMR head 10 may suffer from a low field rise time. Alow field rise time may result, at least in part, from the inductance ofthe conventional head 10. This large inductance increases the time forthe current through the coils 26 and 38 to change as well as the timefor the corresponding magnetic field to be generated by the poles 22,30, and 32. Consequently, write speed may be adversely affected. As aresult, the conventional PMR head 10 may be unsuitable for use at higherdata rates.

The conventional PMR head 10 may also be subject write pole tipprotrusion, which adversely affects disk drive reliability. During use,a write current is driven through the coils 26 and 38. Write currents inthe coils 26 and 38, and other currents such as eddy currents in thecore of the conventional write transducer 20, may heat the conventionalwrite transducer 20. The relatively large resistance of the coil(s) 26and 38 may exacerbate this heating, particularly in the region of theconventional PMR pole 32 and conventional P2 30. The conventional P1 22,conventional P2 30, conventional PMR pole 32, and conventional shield 40typically have large positive coefficients of thermal expansion incomparison to the insulator 24 and write gap 36. When heated, therefore,the tips of P1 22, the conventional PMR pole 32, and the shield 40 nearthe ABS expand, protruding outward toward the ABS. The protrusion ofthese components 22, 32, and 40 is known as pole tip protrusion. Thispole tip protrusion adversely impacts the reliability of disk drivesusing the conventional PMR head 10 because a protruding pole is morelikely to contact the media during operation.

In addition, the conventional P2 30 has may have domains (not explicitlyshown) that are not aligned parallel to the ABS. Instead, the P2 30 mayhave a complicated domain structure, with domains aligned in a varietyof directions. Thus, the domains in the conventional P2 30 may be moredifficult to align in the desired direction for recording. Consequently,performance of the conventional PMR head 10 may be adversely affected,particularly at high data rates.

Accordingly, what is needed is a system and method for improving theperformance and reliability of the conventional PMR head 10,particularly at higher data rates.

BRIEF SUMMARY OF THE INVENTION

A method and system for providing a magnetic transducer are disclosed.The magnetic transducer comprises a first pole, a write gap, a secondpole, a first coil, and a second coil. The first pole has a frontportion on which at least a portion of the write gap resides. The secondpole includes a split yoke that includes a first portion and a secondportion. At least a portion of the first coil resides between the firstportion of the split yoke and the first pole. At least a portion of thesecond coil resides between the second portion of the split yoke and thefirst pole.

BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a diagram depicting a side view of a conventional PMR writehead.

FIG. 2 is a diagram depicting a perspective view of a conventional PMRwrite head.

FIG. 3 is a diagram depicting a side view of an exemplary embodiment PMRwrite head.

FIG. 4 is a diagram depicting a perspective view of an exemplaryembodiment of a PMR write head.

FIG. 5 is a diagram depicting a side view of another exemplaryembodiment PMR write head.

FIG. 6 is a diagram depicting a perspective view of another exemplaryembodiment of a PMR write head.

FIG. 7 is a diagram depicting a side view of another exemplaryembodiment PMR write head.

FIG. 8 is a diagram depicting a perspective view of another exemplaryembodiment of a PMR write head.

FIG. 9 is a diagram depicting a side view of another exemplaryembodiment PMR write head.

FIG. 10 is a diagram depicting a perspective view of another exemplaryembodiment of a PMR write head.

FIG. 11 is a flow chart depicting an exemplary embodiment of a methodfor providing a PMR write head.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIGS. 3 and 4 depict an exemplary embodiment of a portion of a PMR head100. FIG. 3 is a side view of the PMR head 100, while FIG. 4 is aperspective view of the PMR head 100. For simplicity, only a writetransducer 120 is depicted in FIG. 3 and only a portion of the writetransducer 120 is depicted in FIG. 4. For clarity, FIGS. 3 and 4 are notdrawn to scale. The PMR head 100 is preferably used as a write head in amerged head including at least the PMR head 100 and a read head (notshown).

The PMR head 100 includes a first pole P1 122, insulator 124, a coil126, optional P1 pad 128, a second pole P2 130, the PMR write pole (ormain pole) 132, write gap 136, an optional shield pad 134, and anoptional shield 138. Although not explicitly shown, seed layer(s) may beused in providing the poles 122, 130, and 132. The PMR write transducer120 is also depicted with a single split coil 126. However, in analternate embodiment, the PMR head 100 may utilize an additional coilthat is not coplanar with the split coil 126, for example between P2 130and the shield 138. Such an additional coil (not shown) would preferablybe a split coil.

The P2 130 includes a front 129 and a yoke 131. In the embodiment shown,the P2 130 has been split into portions 130A and 130B. Thus, the P2 130has a split yoke. Stated differently, the yoke 131 is also split intotwo portions. Consequently, the pad 134 is also split into two portions134A and 134B. In addition, the P2 130 has a shortened yoke length, l,measured horizontally in FIG. 3. In one embodiment, the yoke length isat least four micrometers, but not more than eight micrometers. Inanother embodiment, the yoke length is not more than six micrometers.

The shield 138 is used in the embodiment depicted in FIGS. 3 and 4.However, in an alternate embodiment, the shield 138 may be omitted. Inaddition, shield 138 may take different forms. For example, the shield138 might be a floating shield that may reside in the region of the ABS,but not extend to the backgap region of the PMR head 100. In theembodiment shown, the shield 138 is depicted as a single piece. However,in another embodiment, the shield 138 may be a split shield having twoportions, in a manner similar to the split yoke P2 130 and the pad 134.Consequently, the shield 138 may be configured based on the split yokeP2 130.

In addition, each portion 130A and 130B of the yoke 131 (and P2 130) hasa separate coil 126A and 126B, respectively. Consequently, the coil 126is also a split coil, composed of two coils 126A and 126B. Because theyoke length of the P2 130 is reduced, the diameter and, therefore,overall length of each of the coils 126A and 126B may also be reduced.The resistance of the split coil 126 may be reduced. Furthermore, thecoils 126A and 126B are configured such that each coil 126A and 126Bgenerates a magnetic field in the same direction in the correspondingportions 130A and 130B, respectively, of the P2 130. Thus, the coils126A and 126B of the split coil 126 operate together to magnetize thePMR pole 132 in the same direction. Consequently, the PMR pole 132 maystill write the desired data to the media (not shown).

In operation, the split coil 126 is energized. Current is driven throughcoils 126A and 126B such that magnetic fields in the same direction aregenerated. Consequently, the portions 130A and 130B of the split yoke P2130 are magnetized in the same direction at P2 130 and the PMR pole 132.In addition, the PMR pole 132 is magnetized and the media written byflux from the pole tip of the PMR pole 132. Based on the direction ofcurrent through the coils 126A and 126B of the split coil 126, thedirection of magnetic flux through the PMR pole 132 changes. Thus, bitshaving opposing magnetization can be written and the desired data storedon the PMR media.

The PMR head 100 may be more suitable for use at high data rates and mayhave improved reliability. Because the P2 130 has a split yoke includingportions 130A and 130B, a split coil 126 including coils 126A and 126Bis used. Consequently, the inductance of the P2 130 and split coil 126may be reduced. As a result, the rise time of the current in the splitcoil 126 and the field rise time in the P2 130 may be reduced.Consequently, higher data rates, for example beyond one gigabit persecond, may be achieved. The shortened yoke length of the P2 130 mayalso result in domains in the portions 130A and 130B that favoralignment parallel to the ABS. Consequently, the portions 130A and 130Bmay have a simpler domain structure. This domain structure may make theP2 130 and thus the PMR pole 132 easier to magnetize in the desireddirection for writing to the media (not shown). Consequently, the PMRhead 100 may have a superior dynamic response, particularly at a highdata rate. In addition, the split coil 126 may have a reducedresistance. As a result, heating in the PMR head 100 may be reduced. Areduction in heating may result in reduced pole tip protrusion. Thus,reliability of the PMR head may be improved. The PMR head 100,therefore, may have improved ability to be used at a high data rate andimproved reliability.

FIGS. 5 and 6 depict another exemplary embodiment of a portion of a PMRhead 200. FIG. 5 is a side view of the PMR head 200, while FIG. 6 is aperspective view of the PMR head 200. For simplicity, only a writetransducer 220 is depicted in FIG. 5 and only a portion of the writetransducer 220 is depicted in FIG. 6. For clarity, FIGS. 5 and 6 are notdrawn to scale. The PMR head 200 is preferably used as a write head in amerged head including at least the PMR head 200 and a read head (notshown).

The PMR head 200 is analogous to the PMR head 100. Consequently,analogous components are labeled similarly. The PMR head 200 thusincludes a P1 222, insulator 224, a split coil 226, optional P1 pad 228,a split yoke P2 230, the PMR pole 232, an optional shield pad 234, awrite gap 236, and an optional shield 238. Although not explicitlyshown, seed layer(s) may be used in providing the poles 222, 230, and232. The PMR write transducer 220 is also depicted with a single splitcoil 226. However, in an alternate embodiment, the PMR head 200 mayutilize an additional coil that is not coplanar with the split coil 226,for example between P2 230 and the shield 238. Such an additional coil(not shown) would preferably be a split coil.

The P2 230 includes a front 229 and a yoke 231. In the embodiment shown,the front 229 of P2 230 is joined, while the yoke 231 has been splitinto portions 231A and 231B. Thus, the P2 230 has a split yoke. However,unlike the P2 130 depicted in FIGS. 3 and 4, the P2 230 is notcompletely split into two sections. Because the yoke 231 is split intoportions 231A and 231B, the pad 234 is also split into two portions 234Aand 234B. In addition, the P2 230 has a shortened yoke length, l,measured horizontally in FIG. 5. In one embodiment, the yoke length isat least four micrometers, but not more than eight micrometers. Inanother embodiment, the yoke length is not more than six micrometers.

The shield 238 is used in the embodiment depicted in FIGS. 5 and 6.However, in an alternate embodiment, the shield 238 may be omitted. Inaddition, shield 238 may take different forms. For example, the shield238 might be a floating shield that may reside in the region of the ABS,but not extend to the backgap region of the PMR head 200. In theembodiment shown, the shield 238 is depicted as a single piece. However,in another embodiment, the shield 238 may be a split shield having tworear portions, in a manner similar to the split yoke P2 230 and the pad234. Consequently, the shield 238 may be configured based on the splityoke P2 230.

In addition, each portion 231A and 231B of the yoke 231 has a separatecoil 226A and 226B, respectively, that may be considered part of thesplit coil 226. Because the yoke length of the P2 230 is reduced, thediameter and, therefore, overall length of each of the coils 226A and226B may also be reduced. The resistance of the split coil 226 may bereduced. Furthermore, the coils 226A and 226B are configured such thateach coil 226A and 226B generates a magnetic field in the same directionin the corresponding portions 231A and 231B, respectively, of the yoke231. Thus, the coils 226A and 226B of the split coil 226 operatetogether to magnetize the PMR pole 232 in the same direction.Consequently, the PMR pole 232 may still write the desired data to themedia (not shown).

The PMR head 200 operates in an analogous manner to the PMR head 100. Inorder to write data to the media (not shown), the split coil 226 isenergized. Current is driven through coils 226A and 226B such thatmagnetic fields in the same direction at P2 230 and the PMR pole 232 aregenerated. Consequently, the portions 231A and 231B of the split yoke231 are magnetized in the same direction. Thus, the PMR pole 232 ismagnetized and the media written by flux from the pole tip of the PMRpole 232. Based on the direction of current through the coils 226A and226B, the direction of magnetic flux through the PMR pole 232 changes.Thus, bits having opposing magnetization can be written and the desireddata stored on the PMR media.

For reasons analogous to those discussed above with respect to the PMRhead 100, the PMR head 200 may be more suitable for use at high datarates and may have improved reliability. In particular, the field risetime, dynamic response time, and pole tip protrusion may be reduced.Consequently, higher data rates, for example beyond one gigabit persecond, may be achieved. The PMR head 200, therefore, may have improvedability to be used at a high data rate and improved reliability.

FIGS. 7 and 8 depict another exemplary embodiment of a portion of a PMRhead 300. FIG. 7 is a side view of the PMR head 300, while FIG. 8 is aperspective view of the PMR head 300. For simplicity, only a writetransducer 320 is depicted in FIG. 7 and only a portion of the writetransducer 320 is depicted in FIG. 8. For clarity, FIGS. 7 and 8 are notdrawn to scale. The PMR head 300 is preferably used as a write head in amerged head including at least the PMR head 300 and a read head (notshown).

The PMR head 300 is analogous to the PMR head 100. Consequently,analogous components are labeled similarly. The PMR head 300 thusincludes a P1 322, insulator 324, a split coil 326, optional P1 pad 328,a P2 330, the PMR write pole 332, an optional shield pad 334, a writegap 336, and an optional shield 338. Although not explicitly shown, seedlayer(s) may be used in providing the poles 322, 330, and 332. The PMRwrite transducer 320 is also depicted with a single split coil 326.However, in an alternate embodiment, the PMR head 300 may utilize anadditional coil that is not coplanar with the split coil 326, forexample between P2 330 and the shield 338. Such an additional coil (notshown) would also preferably be a split coil.

The P2 330 includes a front 329 and a yoke 331. In the embodiment shown,both the front 329 and the yoke 331 of P2 330 are joined. In addition,the P2 330 has a shortened yoke length, l, measured horizontally in FIG.7. In one embodiment, the yoke length is at least four micrometers, butnot more than eight micrometers. In another embodiment, the yoke lengthis not more than six micrometers.

The shield 338 is used in the embodiment depicted in FIGS. 7 and 8.However, in an alternate embodiment, the shield 338 may be omitted. Inaddition, shield 338 may take different forms. For example, the shield338 might be a floating shield that may reside in the region of the ABS,but not extend to the backgap region of the PMR head 300. In theembodiment shown, the shield 338 is depicted as a single piece. However,in another embodiment, the shield 338 may be a split shield having tworear portions, in a manner similar to the pad 334. Consequently, theshield 338 may be configured based on the pad 334.

The split coil 326 includes two coils 326A and 326B. Because the yokelength of the P2 330 is reduced, the diameter and, therefore, overalllength of each of the coils 326A and 326B may also be reduced. Theresistance of the split coil 326 may be reduced. Furthermore, the coils326A and 326B are configured such that each coil 326A and 326B generatesa magnetic field in the same direction in the corresponding portions331A and 331B, respectively, of the yoke 331. Thus, the coils 226A and326B of the split coil 326 operate together to magnetize the PMR pole332 in the same direction. Consequently, the PMR pole 332 may stillwrite the desired data to the media (not shown).

The PMR head 300 operates in an analogous manner to the PMR head 100. Inorder to write data to the media (not shown), the split coil 326 isenergized. Current is driven through coils 326A and 326B such thatmagnetic fields in the same direction at P2 330 and the PMR pole 332 aregenerated. Consequently, the PMR pole 332 is magnetized and the mediawritten by flux from the pole tip of the PMR pole 332. Based on thedirection of current through the coils 326A and 326B, the direction ofmagnetic flux through the PMR pole 332 changes. Thus, bits havingopposing magnetization can be written and the desired data stored on thePMR media.

For reasons similar to those discussed above with respect to the PMRheads 100 and 200, the PMR head 300 may be more suitable for use at highdata rates and may have improved reliability. In particular, the fieldrise time, dynamic response time, and pole tip protrusion may bereduced. Consequently, higher data rates, for example beyond one gigabitper second, may be achieved. The PMR head 300, therefore, may haveimproved ability to be used at a high data rate and improvedreliability.

FIGS. 9 and 10 depict another exemplary embodiment of a portion of a PMRhead 400. FIG. 9 is a side view of the PMR head 400, while FIG. 10 is aperspective view of the PMR head 400. For simplicity, only a writetransducer 420 is depicted in FIG. 9 and only a portion of the writetransducer 420 is depicted in FIG. 10. For clarity, FIGS. 9 and 10 arenot drawn to scale. The PMR head 400 is preferably used as a write headin a merged head including at least the PMR head 400 and a read head(not shown).

The PMR head 400 is analogous to the PMR head 200. Consequently,analogous components are labeled similarly. The PMR head 400 thusincludes a P1 422, insulator 424, a split coil 426, optional P1 pad 428,a split yoke P2 430, the PMR pole 432, an optional shield pad 434, awrite gap 436, and an optional shield 438. Although not explicitlyshown, seed layer(s) may be used in providing the poles 422, 430, and432.

The P2 430 includes a front 429 and a yoke 431. In the embodiment shown,the front 429 of P2 430 is joined, while the yoke 431 has been splitinto portions 431A and 431B. Thus, the P2 430 has a split yoke that isanalogous to the P2 230 depicted in FIGS. 5 and 6. In anotherembodiment, the P2 430 may have a yoke 431 that is not joined at thefront. In such an embodiment, the P2 230 would be analogous to thatdepicted in FIGS. 3 and 4. Referring back to FIGS. 9 and 10, because theyoke 431 is split into portions 431A and 431B, the pad 434 is also splitinto two portions 434A and 434B. In addition, the P2 430 has a shortenedyoke length, l, measured horizontally in FIG. 9. In one embodiment, theyoke length is at least four micrometers, but not more than eightmicrometers. In another embodiment, the yoke length is not more than sixmicrometers.

The shield 438 is used in the embodiment depicted in FIGS. 9 and 10.However, in an alternate embodiment, the shield 438 may be omitted. Inaddition, shield 438 may take different forms. For example, the shield438 might be a floating shield that may reside in the region of the ABS,but not extend to the backgap region of the PMR head 400. In theembodiment shown, the shield 438 is depicted as a single piece. However,in another embodiment, the shield 438 may be a split shield having tworear portions, in a manner similar to the split yoke P2 430 and the pad434. Consequently, the shield 438 may be configured based on the splityoke P2 430.

In addition, each portion 431A and 431B of the yoke 431 has a separatecoil 426A and 426B, respectively, that may be considered part of thesplit coil 426. Moreover, the split coil 426 is soleniodal, rather thana pancake coil as in the PMR heads 100, 200, and 300. Because the yokelength of the P2 430 is reduced, the overall length of each of the coils426A and 426B may also be reduced. The resistance of the split coil 426may be reduced. Furthermore, the coils 426A and 426B are configured suchthat each coil 426A and 426B generates a magnetic field in the samedirection in the corresponding portions 431A and 431B, respectively, ofthe yoke 431. Thus, the coils 426A and 426B of the split coil 426operate together to magnetize the PMR pole 432 in the same direction.Consequently, the PMR pole 432 may still write the desired data to themedia (not shown).

The PMR head 400 operates in an analogous manner to the PMR heads 100,200, and 300. In order to write data to the media (not shown), the splitcoil 426 is energized. Current is driven through coils 426A and 426Bsuch that magnetic fields in the same direction at P2 430 and the PMRpole 432 are generated. Consequently, the portions 431A and 431B of thesplit yoke 431 are magnetized in the same direction. Thus, the PMR pole432 is magnetized and the media written by flux from the pole tip of thePMR pole 432. Based on the direction of current through the coils 426Aand 426B, the direction of magnetic flux through the PMR pole 432changes. Thus, bits having opposing magnetization can be written and thedesired data stored on the PMR media.

For reasons analogous to those discussed above with respect to the PMRheads 100, 200, and 300, the PMR head 400 may be more suitable for useat high data rates and may have improved reliability. In particular, thefield rise time, dynamic response time, and pole tip protrusion may bereduced. Consequently, higher data rates, for example beyond one gigabitper second, may be achieved. The PMR head 400, therefore, may haveimproved ability to be used at a high data rate and improvedreliability.

FIG. 11 is a flow chart depicting an exemplary embodiment of a method500 for providing a PMR write head. For simplicity, steps in the method500 may be skipped or merged. For clarity, the method 500 is describedin the context of the PMR heads 100/200/300/400. Referring to FIGS.3-11, the P1 122/222/322/422 is provided, via step 502. The P1 pad128/228/328/428 may optionally be provided, via step 504. The split coil126/226/326/426 is provided, via step 506. Thus, separate coils 126A and126B/226A and 226B/326A and 326B/426A and 426B are provided. Thus,either pancake coils 126A and 126B/226A and 226B/326A and 326B orsolenoidal coil 426A and 426B may be provided. The split yoke P2130/230/330/430 is provided, via step 508. Thus, step 508 preferablyincludes providing a split yoke 131/231/431 portions 130A and 130B/231Aand 231B/431A and 431B that are physically separate. The PMR pole132/232/332/432 is provided, via step 510. The pad 134/234/334/434 mayoptionally be provided, via step 512. Step 512 includes providingseparate portions 134A and 134B/234A and 234B/334A and 334B/434A and434B. The write gap 136/236/336/436 is provided, via step 514. Theshield 138/238/338/438 in the desired configuration may optionally beprovided, via step 516. Thus, the method 500 can provide the PMR head100, 200, 300, and/or 400. As a result, a PMR head 100, 200, 300, and/or400 having improved ability to be used at a high data rate and improvedreliability may be provided.

1. A magnetic recording transducer having an air-bearing surface (ABS)comprising: a first pole having a first front portion at the ABS; awrite gap; a second pole including a second front portion and a splityoke, at least a portion of the write gap residing on the second frontportion of the second pole, the split yoke including a first portion anda second portion, the first portion being physically disconnected fromthe second portion along a direction substantially parallel to the ABS,the first portion having a first front surface and a first back surface,the first front surface being closer to the ABS than the first backsurface, the second portion having a second front surface and a secondback surface, the second front surface being closer to the ABS than thesecond back surface, the second front portion connecting the first frontsurface of the first portion and the second front surface of the secondportion, the first portion and the second portion of the split yokebeing connected only through the second front portion of the secondpole, at least part of the second front portion residing between thesplit yoke and the ABS; a first coil, at least a portion of the firstcoil residing between the first portion of the split yoke and the firstpole; and a second coil, at least a portion of the second coil residingbetween the second portion of the split yoke and the first pole.
 2. Themagnetic recording transducer of claim 1 further comprising: a thirdpole including a write portion, the write portion residing on the atleast the portion of the write gap.
 3. The magnetic recording transducerof claim 1 wherein the split yoke has a length of not more than eightmicrometers.
 4. The magnetic recording transducer of claim 3 wherein thesplit yoke has a length of not more than six micrometers.
 5. Themagnetic recording transducer of claim 4 wherein the split yoke has alength of at least four micrometers.
 6. The magnetic recordingtransducer of claim 1 wherein at least one of the first coil and thesecond coil is a pancake coil.
 7. The magnetic recording transducer ofclaim 1 wherein at least one of the first coil and the second coil is asolenoid coil.
 8. The magnetic recording transducer of claim 1 whereinthe first coil is configured to generate a first magnetic field in thefirst portion of the split yoke, the second coil is configured togenerate a second field in the second portion of the split yoke, thefirst field and the second field being in substantially a samedirection.
 9. The magnetic recording transducer of claim 1 wherein thefirst coil includes a first plurality of turns and no portion of thefirst coil resides between the second portion of the yoke and the firstpole, and wherein the second coil includes a second plurality of turnsand no part of the second coil resides between the first portion of theyoke and the first pole.
 10. A magnetic recording transducer having anair-bearing surface (ABS) and comprising: a first pole having a firstfront portion at the ABS; a write gap; a second pole including a secondfront portion and a split yoke, at least a portion of the write gapresiding on the second front portion of the second pole, the split yokeincluding a first portion and a second portion, the first portion beingphysically disconnected from the second portion along a directionsubstantially parallel to the ABS, the first portion having a firstfront surface and a first back surface, the first front surface beingcloser to the ABS than the first back surface, the second portion havinga second front surface and a second back surface, the second frontsurface being closer to the ABS than the second back surface, the secondfront portion connecting the first front surface of the first portionand the second front surface of the second portion, the first portionand the second portion of the split yoke being connected only throughthe second front portion of the second pole, at least part of the secondfront portion residing between the split yoke and the ABS, the splityoke having a yoke length of at least four microns and not more than sixmicrons; a first coil, at least a portion of the first coil residingbetween the first portion of the split yoke and the first pole, thefirst coil being at least one of a pancake coil and a solenoidal coil;and a second coil, at least a portion of the second coil residingbetween the second portion of the split yoke and the first pole, thesecond coil being at least one of a pancake coil and a solenoidal coil;a third pole including a write portion, the write portion residing onthe at least the portion of the write gap.
 11. The magnetic recordingtransducer of claim 10 wherein the first coil includes a first pluralityof turns and no portion of the first coil resides between the secondportion of the yoke and the first pole, and wherein the second coilincludes a second plurality of turns and no part of the second coilresides between the first portion of the yoke and the first pole.
 12. Amagnetic recording head comprising: a slider; and a magnetic recordingtransducer integrated with the slider and having an air-bearing surface(ABS), the magnetic recording transducer including a first pole, a writegap, a second pole, a first coil, and a second coil, the first polehaving a first front portion, the second pole including a second frontportion and a split yoke, at least a portion of the write gap residingon the second front portion of the second pole, the split yoke includinga first portion and a second portion, the first portion having a firstfront surface and a first back surface, the first front surface beingcloser to the ABS than the first back surface, the second portion havinga second front surface and a second back surface, the second frontsurface being closer to the ABS than the second back surface, at least aportion of the first coil residing between the first portion of thesplit yoke and the first pole, and at least a portion of the second coilresiding between the second portion of the split yoke and the firstpole, the first portion being physically disconnected from the secondportion along a direction substantially perpendicular to the ABS, thesecond front portion connecting the first front surface of the firstportion and the second front surface of the second portion, the firstportion and the second portion of the split yoke being connected onlythrough the second front portion of the second pole, at least part ofthe second front portion residing between the split yoke and the ABS.13. The magnetic recording head of claim 12 further comprising: a thirdpole including a write portion, the write portion residing on the atleast the portion of the write gap.
 14. The magnetic recording head ofclaim 12 wherein the split yoke has a length of not more than eightmicrometers.
 15. The magnetic recording head of claim 14 wherein thesplit yoke has a length of not more than six micrometers.
 16. Themagnetic recording head of claim 15 wherein the split yoke has a lengthof at least four micrometers.
 17. The magnetic recording head of claim12 wherein at least one of the first coil and the second coil is apancake coil.
 18. The magnetic recording head of claim 12 wherein atleast one of the first coil and the second coil is a solenoid coil. 19.The magnetic recording head of claim 12 wherein the first coil isconfigured to generate a first magnetic field in the first portion ofthe split yoke, the second coil is configured to generate a second fieldin the second portion of the split yoke, the first field and the secondfield being in substantially a same direction.
 20. The magneticrecording head of claim 12 wherein the first coil includes a firstplurality of turns and no portion of the first coil resides between thesecond portion of the yoke and the first pole, and wherein the secondcoil includes a second plurality of turns and no part of the second coilresides between the first portion of the yoke and the first pole.